Underwater active electrolocation technology is a new kind of technology for underwater detection and environmental perception, whose discovery was inspired by the active electrolocation systems of weakly electric fish. The amplitude information-frequency characteristics (AIFC) obtained by an underwater active electrolocation system (UAES) can effectively assess information about probed objects, such as their material composition, shape, and conductivity. Traditionally, single-frequency excitation has been employed in a UAES, which can make object detection inefficient and time-consuming. We employed multi-frequency signals for excitation in a UAES, to improve the efficiency of detection. We used three kinds of multi-frequency excitation signals-square wave, single pulse, and biphasic pulse, to detect objects under water. To improve the accuracy of measurements, we developed an AIFC recognition algorithm. The experimental results showed that the multi-frequency excitation detection method is effective and feasible. We demonstrated that the electrodes are strongly coupled to the UAES and can result in non-negligible errors that have often been previously ignored. In addition, graphite electrodes performed much better than titanium electrodes for multi-frequency signal detection, and bio-inspired multi-frequency pulse excitation signals gave more accurate results than the square-wave signal.

中文翻译：

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水下有源电定位系统多频激励的幅度信息频率特性。

水下主动电定位技术是一种用于水下检测和环境感知的新型技术，其发现受到弱电鱼的主动电定位系统的启发。通过水下主动电定位系统（UAES）获得的振幅信息-频率特性（AIFC）可以有效地评估有关被探物体的信息，例如其材料成分，形状和电导率。传统上，在UAES中采用了单频激励，这会使目标检测效率低下且耗时。我们在UAES中采用多频信号进行激励，以提高检测效率。我们使用方波，单脉冲和双相脉冲这三种多频激励信号来检测水下物体。为了提高测量的准确性，我们开发了AIFC识别算法。实验结果表明，多频激励检测方法是有效可行的。我们证明了电极与UAES牢固耦合，并可能导致以前通常忽略的不可忽略的错误。此外，石墨电极在多频信号检测方面的性能要比钛电极好得多，而生物启发的多频脉冲激励信号比方波信号提供了更准确的结果。我们证明了电极与UAES紧密耦合，并可能导致以前常常被忽略的不可忽略的错误。此外，石墨电极在多频信号检测方面的性能要比钛电极好得多，生物启发的多频脉冲激励信号比方波信号提供了更准确的结果。我们证明了电极与UAES紧密耦合，并可能导致以前常常被忽略的不可忽略的错误。此外，石墨电极在多频信号检测方面的性能要比钛电极好得多，生物启发的多频脉冲激励信号比方波信号提供了更准确的结果。