为了精准研究舰载红外系统在海雾条件下的探测能力, 提高舰载防御系统在复杂条件下的作战使用效率, 在对红外系统工作原理和实际装备使用情况进行深入调查研究的基础上, 提出了以“两步计算法”来求取舰载红外系统在海雾中的有效探测距离。首先, 根据海雾强度水平先行求出红外传感器的理论探测距离, 然后对探测能力指数进行了定义并根据计算结果判断是否需要用探测能力指数二次计算有效探测距离。探测能力指数模型综合考虑了人、海洋环境和设备三方交互影响的因素, 以判断矩阵合理确定各方权重, 较好地解决了单纯依靠海雾信息进行计算而出现的失灵问题。

In order to precisely study the detection ability under sea fog conditions for shipborne infrared system and to improve the combat efficiency for shipborne defense system under complex conditions, based on a deep investigation for the actual equipment and working principle of infrared system, a "two step method" was put forward to calculate the actual detection distance of the system in the sea fog. Firstly, according to the sea fog intensity level, the theoretical detection distance of infrared sensor was got in advance, and then judge whether the second calculation was needed to get the actual effective detection distance by the detection capability index. The detection capability index model took into account the interactions among the human, marine environment and equipment. The model judges the weight of separate parties reasonably, effectively solves the problem of "computational failure" which is solely dependent on sea fog information.