内河船机在线监测系统数据缓存与恢复方法

Data cache and recovery method of inland watercraft online monitoring system

内河船机在线监测系统通过无线网络实时向后台传输船舶运行数据,当内河船舶驶入信号较差或无信号的航区时,采集的数据无法正常发送至岸基,会导致数据的不连续。文章介绍了一种基于利用外置SD卡进行数据缓存与恢复的处理方法。按照该方法,信号较弱无法满足传输要求时,携带时间轴标记的数据将储存至SD卡中,同时周期性地查询网络强度,等到判断网络信号恢复后,历史数据将按时间顺序重新恢复发出。

The on-line monitoring system for inland river vessels transmits ship operation data to the background in real time via wireless networks.When inland river vessels enter a navigation area with poor or no signal,the collected data cannot be sent to shore-based normally,which will cause data inconsistency,continuous.The article introduces a processing method based on the use of external SD card for data caching and recovery.According to this method,when the signal is weak and cannot meet the transmission requirements,the data with the time axis mark will be stored in the SD card,and the network strength will be periodically queried.After the network signal is judged to be restored,the historical data will be resumed in chronological order.