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设计并实现了一种基于探测器阵列组件的光斑辅助定位系统。该系统以120元Si-PIN探测器作为光电传感器,将其排列为正方形,由120路光电转换电路将每个光电传感器采集到的电流信号转换为电压信号并与预先设置的阈值电平进行比较,以判断该点探测器是否探测到光信号,在CPLD时序控制下将每个探测器的响应情况通过数据采集电路实时传送至上位机。将探测器阵列组件放置在指定位置,通过调节光源位置直至上位机反映的图像为对准后的形式,由此实现光斑辅助定位。经测试表明,该系统能实现240mm×240mm大面积、精度2mm的光斑位置实时探测和辅助定位,且相对传统方式更加简单可行。
A spot-assisted positioning system based on detector array is designed and implemented. The system uses 120 yuan Si-PIN detector as a photoelectric sensor, which is arranged in a square, 120 photoelectric conversion circuit will each photoelectric sensor current signal is collected into a voltage signal and with the preset threshold level to compare , To determine whether the point detector detects the optical signal, under the control of the CPLD timing of each detector response through the data acquisition circuit in real time transmitted to the host computer. The detector array component is placed at a specified position, and the position of the light source is adjusted until the image reflected by the upper computer is in an aligned form, thereby realizing spot-assisted positioning. The test shows that the system can achieve 240mm × 240mm large area, the accuracy of spot position 2mm real-time detection and positioning, and the relative traditional way is more simple and feasible.