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介绍了空气中直升机探测的研究状态和应用情况,分析了直升机噪声的特征,并根据其线谱、信噪比等特征,给出一种水下探测直升机的方案。结合基频检测和谐波提取等技术措施来实现对直升机的水下检测与识别,采用实测数据进行仿真,验证了技术方案的可行性。该技术不仅可以有效地识别直升机,还便于水下长时间待机装置的低能耗实现。
The research status and application of helicopter detection in the air are introduced. The characteristics of helicopter noise are analyzed. Based on the characteristics of line spectrum and signal to noise ratio, a scheme of underwater helicopter detection is given. Combined with the fundamental frequency detection and harmonic extraction and other technical measures to achieve the underwater helicopter detection and identification, the measured data were used to simulate the feasibility of the technical solutions. This technology can not only identify the helicopter effectively, but also facilitate the low energy consumption of long standby underwater equipment.