基于PLC的双轴逐日控制系统的设计与研究

Design and Research of Double Axis SunTracking System Based on PLC

根据光照强度传感器的感应电流与光照强度成正比的特性,提出通过光照强度传感器检测光伏板四周光照强度的差值作为检测信号进行光照角度检测。通过转换放大电路将光感器产生的光生电流转换为适应EM231数模转换模块工作的电压,经过PLC内部程序实时计算光伏板上下和左右两组电压差值,确定光伏板的中心位置与太阳光角度的偏差,进而驱动伺服电机调节光伏电池板的角度,对太阳光垂直射入方向精准定位,实现了系统发电量的大幅提升。

According to the characteristic that the induced current of the light intensity sensor is directly proportion to the light intensity,the design scheme in this paper is to propose that the difference value of light intensity around the photovoltaic panel is detected by the light intensity sensor as the detection signal for the light Angle detection,so as to realize the optimization of the light Angle monitoring method of the existing twoaxis sun tracking system.By transforming the amplifier circuit to convert light sensor produced by light raw current to adapt to the voltage of the EM231 analog-to-digital conversion module,real time by a PLC internal process calculation of photovoltaic panels and up and down or so two set of optical sensor by converting amplifying circuit to convert the voltage difference,determine the center of the photovoltaic panels and the deviation of the Angle of the sun and then drive servo motor to adjust the Angle of photovoltaic panels,accurate positioning of sunlight into the vertical direction,realize the system output increased substantially.