Design And Realization Of Beidou Short Message Equipment Based On Beidou Satellite System

The fishing boats lack of instant communication and navigation at sea,BD-2 short message sending and receiving equipment for fishing boats based on the short message receiving and sending application of BD-2 satellite navigation system.the equipment has the characteristics of far communication distance,low cost,high reliability and practicability.the satellite coverage area,the two-way short message communication can be used between the ship and the ship,the ship and the family members of the ship,the ship and the management department.Besides,the equipment provides the fishing boats navigation and time giving service but no distance limit.Fishery management department construct Fisheries monitoring platform through the Beidou satellite navigation system,send the relevant information to the fishery production to the ship,it contains information services such as fishing policy,typhoon notices,notices of navigation,weather conditions in various sea areas,fishing news and news,using the position reporting application of Beidou short message equipment to realize the management of fishing boats position monitoring,fishing boats distress and rescue command,etc..monitoring fishing boats in the exclusive economic zone for fishing,when there is a danger or unexpected situation occurs,the fishing boats can use the equipment to send information to the fisheries management department for help.the thesis detailed describes how to make each function module of Beidou short messages equipment.The main works and innovative results are listed as follow:1,The principle of the ship Beidou short message equipment is expounded.First of all,the equipment is composed of short message transceiver,antenna and high-frequency cable.the principle of short message transceiver based on Beidou satellite navigation system,introduces the basic function of equipment.Secondly,describes the four key technologies in the realization process of the equipment,including a variety of signal interference and signal transmission technology,single cable automatic frequency difference correction and zero stability and consistency,the concrete realization method of key technology.2,To determine the overall design of the equipment.First of all,according to user requirements,the detailed design of the antenna and the transceiver structure by using three-dimensional design software to determine the size,antenna and transceiver installation mode and internal hardware module layout and relationship.Secondly,according to the functional requirements of the equipment,to determine the antenna and transceiver each contain functional modules,completed the design of PCB board.At the same time,the hardware design of the software to determine the function of the module,the preparation of the software code.3.The equipment was tested by the index.First,the hardware and software of the equipment are debugged,so that the equipment can reach the requirements of the equipment at room temperature.Then the test conditions of equipment,including low temperature working,high temperature working,damp heat,salt fog,rain,etc..Finally,the equipment is delivered to the user,and the user gives a high evaluation of the practicability and reliability for the equipment.4.The equipment help the fishing boat solves the problem at lack of communication and navigation,provides a fast,economical and practical communication for fishing boats,supervision departments directly to the management of fishing boats,but also provided a guarantee for safe navigation of fishing boats.