Design Of Unmanned Ship Monitoring System Based On Android

In the process of navigation monitoring of unmanned ships,the shore-based monitoring system is the key link in which key design is needed.Most of today's ship monitoring systems and application platforms for electronic chart systems are computers,which have certain limitations in terms of system carriers.At the same time,consider flexibility,convenience and compatibility.The Android-based unmanned ship monitoring system can meet the needs of convenience and flexibility,making the construction of the ship-shore communication platform more convenient.This paper is based on the Android system development of the unmanned ship shore based monitoring system.The monitoring system map embedding technology and the ant colony-based path planning method are studied,which lays a foundation for path tracking monitoring.The unmanned ship attitude monitoring technology and data fusion algorithm are studied.The unmanned ship GPS carrier phase attitude monitoring technology and the carrier signal attitude measurement method are adopted.The unmanned ship attitude monitoring was realized.The development of Android-based unmanned ship monitoring system platform has important research significance and practical significance.It is supported by 2017 Major Science and Technology Special Project of Guangdong Province(2017B010118002)and 2018 Major Industrial Science and Technology Projects in Guangzhou(201802020031).The main works of this paper are illustrated as follow:(1)The electronic chart and Android development environment was introduced.An overview of electronic charts was discussed primarily from electronic chart systems(ECS)and electronic chart specifications and standards.The S57 electronic chart was selected for research and utilization.The demand analysis of the unmanned ship shore monitoring system was discussed.The unmanned ship Android terminal monitoring system platform was planned.The track monitoring of unmanned ship routes and the attitude monitoring function of unmanned ships were analyzed in detail.The control process of the Android terminal monitoring system for the unmanned ship shore was planned.And the unmanned ship Android terminal monitoring system communication platform was planned.(2)The electronic chart standard format was analyzed.The electronic chart application platform of SuperMap ENC Designer plug-in is applied to perform data conversion,data management and data display on the electronic chart.By using Iserver as the workspace to generate the corresponding REST service interface,the software development kit for the HyperMap Cloud Service Android version was applied.The control mode is designed to perform the human-computer interaction interface operation.The principle of ant colony algorithm is introduced.A path planning algorithm based on ant colony algorithm is proposed.The binarized image of the Pearl River estuary screenshot was applied and the ant colony-based path planning algorithm was tested.(3)The communication method of the socket is selected.A ship-to-shore GPS data communication transmission framework was built.The Service component is used to design the GPS module of the monitoring system.The signal structure transmitted by GPS positioning and navigation is analyzed,and a method for establishing the state by using the phase of the carrier signal in the signal is proposed.Eliminate redundant error terms by using differential equations.The geometric relationship between the difference equation and the mathematical model of state localization is established.The GPS carrier signal is studied to carry out the unmanned ship attitude measurement technology.The measurement error is reduced by solving the transformation matrix of the whole-circumference ambiguity and the baseline pose to the carrier pose.The data fusion algorithm was studied and its effectiveness was verified.(4)The unmanned ship monitoring system platform was built,which was mainly divided into two parts: the remote shore end and the front end unmanned ship.The simulation experiment of unmanned ship attitude monitoring and data fusion algorithm was carried out.Three sets of baseline attitudes were set up in the test,and the original carrier phase signals of the GPS satellites were measured under the static conditions of the unmanned ship.After obtaining the original data of the unmanned ship's attitude information,the above-mentioned unmanned ship attitude monitoring and data fusion algorithm was used to carry out the simulation experiment.The results show that the algorithm is effective and the measurement accuracy meets the requirements of use.The functional application test of the unmanned ship monitoring system was carried out.A berth map with a scale of 1:10000 from the Pearl River Estuary-Huangpu-Guangzhou basin was selected as the function commissioning chart.The electronic chart is parsed and embedded into the Android side.Furthermore,the electronic chart display and coordinate query functions are simply debugged.The validity of chart display,positioning and data transmission was verified.The function integration test of the unmanned ship monitoring system was carried out.On the remote shore-based Android device,a number of monitoring functions such as coordinate query function display,GPS monitoring function,route track monitoring function and data communication function were tested.These functions have successfully passed the actual test verification,which shows the effectiveness of the Android-based unmanned ship monitoring system design.