应用微型计算机提高摆的振幅衰减测量精度(英文)

Application of Micro-Computer to Improve Measurement Accuracy of The Amplitude Attenuation in Pendulum

为了提高摆的振幅衰减的测量精度,采用下列改进方法:使用CCD线阵—2048个发光元件平均分布在3 cm的单元中,用来代替光电池.应用微型计算机控制系统收集光标数据.使测量的电压转换为被反射的扭转角的数字逻辑信号.当摆和感应器中的反射镜之间距离达3 m时,扭转角度为5×10-6rad.

To improve the measuring accuracy of the attenuation amplitude in pendulum,the following renovation methods were adopted：The Charge-Coupled Device（CCD）,which had 2048 light units that could be divided equally in 3 cm range of transform,was used to replace the photocell.In addition,a micro-computer control system was used to collect data of the light position.As a result,levels of voltage of photocells should be replaced by the logistic signal as the means to reflect the torsion angle.When the distance between the mirror in pendulum and the sensor reaches 3 meters long, the resolving power of torsion angle is 5 × 10^ -6 radian.