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通过水下布放的垂直线列阵采集空中声源在水下激发的测量声场,采用声场波数积分模型(OASES模型)对空中声源激发的水下声场建模,计算出拷贝声场,将二者进行匹配处理从而对空中声源目标定位。首先通过数值仿真验证了匹配场处理技术对空中声源的测距能力,并通过引入宽带匹配场处理器平滑掉距离上的周期性旁瓣。最后分析南海某海域的空气声试验数据,采用常规匹配场方法对700 m以内的32组空中声源目标进行定位,测距结果与GPS计算的收发间实际距离相比,大多数情况下是一致的,在较远距离由于信噪比降低,测量结果容易出现偏差。
The sound field of the underwater sound source excited by the underwater sound source is collected by a vertical line array laid under the water. The underwater sound field excited by the air source is modeled by the wave number integral model of the sound field (OASES model), the copy sound field is calculated, Who match the air source to locate the target. First of all, we verify the capability of matching field processing to airborne source by numerical simulation and smooth out the periodic sidelobes on the distance by introducing a broadband matching field processor. Finally, the air-sounding test data of a sea area in the South China Sea are analyzed. The conventional matching field method is used to locate the 32 groups of aerial sound sources within 700 m. The result of the distance measurement is consistent with the actual distance between the transceiver and the GPS calculated in most cases , At a longer distance due to lower signal to noise ratio, the measurement results prone to deviation.