针对线阵CCD立靶测量系统采用45°仰角交会导致靶心距地面过高,难以满足测试要求的问题,提出了通过降低摄像系统仰角满足试验要求的方法,研究了低仰角测试引起的靶面参数、目标识别和测量精度等对测试结果的影响。分析表明:可实现对目标的准确识别明显降低靶心。以10 m×10 m靶为例,当仰角大于32°时,测量精度优于50 mm;大于33°时,测量精度优于40 mm;大于38°时,测量精度优于20 mm。试验人员可合理选择仰角,以满足不同试验需求。

As the 45° elevation angle used in the intersection measurement of the linear array CCD target equipment leads to the problem that the target center is too high from the ground which is difficult to meet the test requirements, a method by reducing the elevation angle of the camera system is proposed. This paper focuses on the influence of factors such as target parameters, target recognition and measurement accuracy caused by low elevation test on test results. The analysis shows that by this way, the target can be accurately identified. At the same time, by lowing the elevation angle of the camera system, the target center can be significantly reduced. Take 10m×10m target as an example: when the elevation angle is more than 32°,the accuracy can be less than 50mm; when the elevation angle is more than 33°, the accuracy can be less than 40mm; when the elevation angle is more than 38°, the accuracy can be less than 20mm. Thus, testers can select reasonable elevation angle of the camera system to meet the test demand.