解决了浅水深度中各种目标的最小距离检测问题

А.А. Gadzhiev, R. Eminov, K. Asadov
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引用次数: 0

摘要

研究对象和目的。研究的对象是水体底部各种物品的排列。研究的目的是实现这类物品的最大隐形性。海底物体的预期搜索或意外探测可以通过测深法进行,即评估这些物体上方的水柱。材料和方法。预计配备测深激光发射器的低空无人机(无人飞行器)将用于探测水下物体。考虑到一些简化,对位于海床上的物体的测深激光探测器的操作进行了优化。当可靠地记录从海床和水下物体反射的信号之间的差异时,检测水下物体的任务被认为是解决的。最小外部可探测性是在所述差值的最小值处实现的。主要结果。获得了一个目标函数来表征来自多个水下物体的总信号。作为执行优化的结果,确定了实现目标函数的最小值的条件。根据所获得的结果,如果水下物体的高度和反射系数随时间变化,即一个物体的增长伴随着另一个的减小,则水下物体反射的总信号达到其最小值。结论提出并验证了叠放在海床上的物体的最小可探测性方法。定义了在海床上存储各种物体的实用程序,以确保低空无人机上的测深激光探测器不可见这些物体。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Solution to the problem of minimum distance detection of various objects in shallow water depth
Object and purpose of research. The object of research is arrangement of various items on the bottom of water bodies. The purpose of research is achieving maximum invisibility for such items. Anticipated search or accidental detection of bottom objects can be carried out by the bathymetric method, i.e. assessment of water column over such objects. Materials and methods. It is expected that low flying UAVs (unmanned aerial vehicles) equipped with bathymetric laser emitter are used for detection of underwater objects. With consideration of some simplifications, optimization is carried out for the operation of bathymetric laser detector of objects located on the sea bed. The task of detecting an underwater object is considered to be solved when the difference between the signals reflected from the sea bed and underwater object is reliably recorded. Minimum external detectability is achieved at minimum of the said difference. Main results. An objective functional is obtained to characterize the total signal from multiple underwater objects. As a result of performed optimization, the condition is determined at which the minimum of the objective functional is achieved. According to the obtained result, the total signal reflected from an underwater object reaches its minimum if the height of underwater objects and their reflection coefficient vary paraphase, i.e. the growth of one is accompanied with the reduction of the other. Conclusion. A method for minimum detectability of objects stacked on the sea bed is suggested and validated. Practical procedures of storing various objects on the sea bed are defined, which ensures their invisibility for the bathymetric laser detector onboard the low-flying UAV.
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