A visual servo scheme is employed for the closed loop mode, while astronomy theory is used for the open loop mode.
其闭环工作模式采用了视觉伺服控制方法，开环工作模式则采用了天文跟踪方法；
The sensor is made up of original circuit, magnetic core, Hall part, secondary coil and magnifier. There are two work modes: direct measure mode and closed-loop mode.
其结构由原边电路、聚磁环、霍尔器件、次级线圈和放大电路等组成， 分直测式和磁补偿式两种工作方式。
The solar tracker has two working modes, open loop mode and closed loop one, and it consists of an imaging unit, a turntable, steppers, the subsystem of micro control unit, a computer and so on.
提出的太阳跟踪器具有开环和闭环两种工作模式，由成像单元、转台、步进电机、单片机、上位机等模块构成；
The solar tracker has two working modes, open loop mode and closed loop one, and it consists of an imaging unit, a turntable, steppers, the subsystem of micro control unit, a computer and so on.
提出的太阳跟踪器具有开环和闭环两种工作模式，由成像单元、转台、步进电机、单片机、上位机等模块构成；
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