Small And Medium-sized Vessel Monitoring System Based On Dual Can Bus Design

Along with the rapid development of information technology,the network control system based on the Fieldbus has shown the right direction for developing ship automation.This article presents a ship monitoring and control system based on CANBUS including a engine room monitoring system and a bridge centralized control panel module.The engine room monitoring system collects and transmits parameters of the engine room equipments,and possesses functions such as data disposal,graphical display,failure alarm.It also provides selectable units for local parameter display. The bridge centralized control panel module includes three digital instruments which carry out the rudder servo control, numeric display of rudder angle and course,and audible and visual failure alarm.In this article,the Fieldbus and its application in ship automation is briefly introduced.Then,a monitoring and control system based on dual CANBUS for small and medium-sized vessel is brought forward.It is described in detail how the dual CANBUS works.The function modules of the monitoring node are presented separately. Monitoring software with graphical interfaces was developed under Linux system.Three digital instruments are described,which consist of the bridge centralized control panel module.Several anti-jamming measures are analyzed at length, especially, some advanced anti-EMI components are introduced.The ship monitoring and control system has following characteristics.First,the physical part of CANBUS is redundancy.In other word,two set of network media,driver and controller are used to provide alternative functional channels in case of failure.Second,both software and hardware anti-jamming measures are used to conquer the serious EMI and poor conditions of the engine room. Advanced anti-EMI components used in the design have a good performance.Third,monitoring software was developed with MiniGUI under Linux,which has friendly interface and runs steadily.Fourth,three new digital instruments were developed to replace the backward analog instruments that are still used widespreadly on small and medium-sized vessels in China.They have high cost performance and are convenient to use. The monitoring and control system for small and medium-sized vessel based on dual CANBUS has strong function and high reliability.It is able to increase the level of ship automation,improve the navigation safety, reduce production and operating costs,and reduce the crew's labour intensity. It has a good market prospects and is worth to promote for its high cost performance.