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一、引言在回声定位系统中,通常只测定两维数据,即每个被测目标的距离和方位。然而,在某些情况下,要求知道每个目标的三维座标,例如在空中交通控制中就是如此。显示这种数据时,显示系统可以提供也可以不提供三维幻觉(illusion)。在目标场相对地简单和慢变化的场合,用两个两维显示器来显示信息可以得到很好的结果。在其它的应用中,有关的第三维信息可以用编码的形式记录在一个两维显示器上单独显示。然而,在复杂的或者是在快变化的情况下,把数据显示在一个三维幻觉显示器上可以大大地简化工作人员的任务。
I. INTRODUCTION In echo positioning system, usually only two-dimensional data is measured, that is, the distance and azimuth of each measured object. However, in some cases it is required to know the 3D coordinates of each target, as for example in air traffic control. When displaying this data, the display system may or may not provide three-dimensional illusion. Where the target field is relatively simple and slow to change, displaying the information with two two-dimensional displays can yield good results. In other applications, the relevant third dimensional information can be recorded in a coded form on a two-dimensional display separately. However, displaying the data on a three-dimensional hallucination monitor can greatly simplify the task of the worker in complex or rapidly changing situations.