基于脉冲信号的水下目标定位解算技术研究
上海交通大学, 电子信息与电气工程学院自动化系, 上海 200240
| 摘 要： | 基于脉冲信号的水下目标探测方法在海洋工程领域有诸多应用。本文在基于传统圆形交汇定位解算仿真分析的基础上，研究并设计三脉冲编码信号估计时延信息精准求解目标深度的方案，利用其首脉冲信号探测目标位置并解算水平距离信息；测深脉冲和参考脉冲分别与首脉冲的时延差值对应目标内的高精度传感器获取的压力差，从而将目标的深度信息调制在信号时延信息上；将拷贝相关技术与正交接收机算法理论相结合，完成测深脉冲与参考脉冲的幅值检测与包络估计。通过外场实测数据结果验证，基于脉冲信号的水下目标解算算法能够在特定场景下实现水平定位误差小于5m，深度定位误差小于2m的指标。此技术可为水下目标协同定位与航行保障维护提供有力支撑。 |
| 关 键 词： | 脉冲信号设计; 水下目标定位; 圆形交汇算法; 误差分析 |
| DOI： | 10.57237/j.se.2023.03.003 |
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收稿日期: 2023-04-29
接受日期: 2023-06-25
在线出版日期: 2023-06-29
Research on Underwater Target Positioning and Calculation based on Pulse Signal
School of Electronic Information and Electrical Engineering Department of Automation, Shanghai Jiao Tong University, Shanghai 200240, China
| Abstract: | The underwater target detection based on the pulse signal has many applications in the field of marine engineering. Based on the simulation analysis of the traditional circular intersection positioning solution, this paper studies and designs a scheme for accurately calculating the target depth by estimating the time delay information of the three-pulse coded signal. The first pulse signal detects the target position and calculates the horizontal distance information. The time delay difference between the sounding pulse and the reference pulse and the first pulse corresponds to the pressure difference obtained by the high-precision sensor in the target, and the depth information of the target is obtained. However, the copy correlation technology is combined with the quadrature receiver algorithm theory to complete the amplitude detection and envelope estimation of sounding pulse and reference pulse. Through the verification of the field measurement data results, the underwater target resolution algorithm based on the pulse signal can achieve the indicators that the horizontal positioning error of the target is less than 5m and the depth positioning error is less than 2m in a specific scenario. This method can provide strong support for collaborative positioning of underwater targets and guarantee early warning maintenance. |
| Keywords: | Pulse Signal Design; Underwater Target Location; Circular Intersection Algorithm; Error Analysis |
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