降低光电判读仪点阵误码率的方法

Way of reducing the rate of wrong code in photoelectric interpretoscope

光电判读仪是试验靶场光电经纬仪的数据处理配套设备 ,主要是对经纬仪测角原码数值进行解译 ,其介质是经纬仪所拍摄的测量胶片 ,原始数据以点阵形式存在 ,光电判读仪点阵数据采集原有的方法是经光电转换将胶片的点阵变为脉冲信号 ,然后进行整形、放大、压缩 ,最后以查询的方式对点阵脉冲进行采集识别 ,当脉冲宽度不一致时 ,误码率极高。提出了通过改变点阵采集方式 ,在计算机允许的时间范围内 ,利用重心法对压缩后的点阵脉冲进行全程采集的方法 ,此方法在脉冲宽度不一致时 ,仍能正常识别 ,从而提高了点阵的识别能力 。

The photoelectric interpretoscope is a data processing complete set of equipment of photoelectric theodolite used in experimental shooting range. Its main purpose is to interpret the numerical value of the measuring angle of theodolite. And the medium is the measuring films photographed by theodolite. The original data is in the form of lattice. The traditional ways of data collection of photoelectric interpretoscope are firstly changing the lattice of films into pulse signals, and then rebuilding, enlarging and compressing them. Finally the lattice pulse signals are collected and distinguished by means of inquiring. But the rate of wrong code is always very high when the widths of pulse signals are not identical. A new way of data collection is presented in which the compressed lattice is collected within the time limitation permitted by computer with barycenter method. The method can also work properly when the widths of pulse signals are not identical. The distinguishability is increased and the rate of wrong code is reduced.