Research On The Effection Of Geometric Features Of Measured Object And Frequency Characteristics Of Detection Field On Underwater Active Electrolocation System

As is known to all, most of the surface area of the Earth is ocean, and there contains a lot of resources which are needed by our human for production. So, explore the ocean is a very important issue, and research the new exploration technologies is the core challenge. Especially the traditional method of navigation has meets the technical bottleneck in the area of the deep-sea exploration, it is urgently to seek ways to solve the technical difficulties. Based on underwater active electrolocation technology to locate probed object is a new underwater exploration technology, and it is hold a promise to break through the bottleneck of the traditional navigation methods. It is inspired from the study of the weakly electric fish. Biologists found that some type of weakly electric fishes have two kinds of unique organs, one kind of them can create a weakly electric field, another kind can detect the change of the electric field around its body and transmit the electric signal to its brain to analysis the signal. This fish type relies on these processes to perceive the environment. The research of the underwater active electrolocation is still in its initial state, but many scientists gradually begin to focus on the technology because its unique advantage, such as simple construction, low energy consumption, low demand for surrounding environmental conditions.This paper relies on the principle of underwater active electrolocation and experimentalize on our underwater active electrolocation experimental platform. We will mainly study on the influence of the underwater active electrolocation system which is caused by geometric features of the probed object and frequency features of the detection electric field. Sweep frequency is used in the experiment to locate the probed object, a large amount of experiment data have been obtained by using different frequency features of the exciting signal and different geometric features with the same material of the probed object to do experiments. The data is processed by the professional signal analysis tool and analysis algorithm designs by myself. By analysis the experiment data, the following conclusions have been obtained:1. On the situation of the same experiment environment and experiment method, geometric of the probed object will have a significant impact on the Frequency Inflection Point (FIP) of the underwater active electrolocation system.2. No matter how to change the geometric feature of the probed object when the object’s material is plastics, the joint time frequency spectrum (JTFS) will always shows a convex state. So there is no Frequency Inflection Point and Detect Frequency Dead Zone in underwater active electrolocation system in this situation.3. At the situation of the same materials probed object with the same geometric feature, the Frequency Inflection Point and Detect Frequency Dead Zone of the underwater active electrolocation system will be significant impacted when change the frequency feature of exciting signal.According to the research results of the impact of the underwater active system by exciting signal frequency features, the algorithm of the underwater active electrolocation and probed object attributes judgement has been improved. The improvement is presented as procedure simplification and reliability enhancement.