The steady rotating speed control is achieved by phase-compensation in sectorscan.
在扇形扫描中，马达稳速的控制是通过相位补偿实现的。
2
The measurement of antenna motion parameters, such as antenna sectorscan Angle, sectorscan speed, circle scan speed etc.
天线运动参数如天线扇扫范围、天线扇扫速度、天线环扫速度等参数的测量通常采用手动计时器测量。
3
In the B-mode sectorscan ultrasonic imaging system, the raw image is in polar coordinates, therefore, it is main tasks of image pre-processing to achieve image coordinate transform and interpolation.