Application of time series database in the field of ship risk management

Recently, Jesse has been learning and expanding her knowledge all the time. She saw an article "Data Preprocessing of Ship Risk Management System Based on TSDB" in the journal "China Ship Repair", so this issue also wants to use this article.Based on this, I will briefly talk about the application of TSDB in the field of ship risk management.

This article only represents my personal opinion, if there is any bias, please also ask Haihan~

Today, the advancement of technology has made the equipment of ships more advanced and the knowledge received by the crew more abundant, but the accident rate has continued to increase.The domino theory holds that the occurrence of a casualty accident is not an isolated event, although the injury may occur suddenly at a certain moment, it is the result of a series of events occurring in succession.We believe that the main factors leading to accidents are the unsafe behavior of people, the unsafe state of things and management defects.Because of the frequent occurrence of accidents, the safety management of ships is a must.Ship safety management is a series of management work such as leadership, organization and control around ship performance, technical safety, cargo safety and the safety of life and property of relevant personnel.In order to achieve comprehensive and scientific risk management, building a ship risk management system is also a top priority.We need to monitor the relevant parameters of important equipment and systems in the ship's engine room in real time, analyze the relationship between changes in relevant parameters and the failure of the ship's engine, and clarify the specific mechanism and consequences of the risk.

Since the ship risk management system is so important, what is its overall design?From an overall perspective, the ship risk management system is shown in the figure below.The real-time data of the ship is transmitted to the shore through the public network, and the data includes multiple parameters such as main engine load, torque, speed, fuel temperature, etc. After data preprocessing through reception and analysis, abnormal data elimination and missing data supplementation, the data is stored.Enter the TSDB; subsequently read the data in the TSDB to realize real-time monitoring, over-limit alarm, data analysis and risk warning and other functions; and build a corresponding data platform to visualize the monitoring content and subsequent analysis results.We can see that TSDB is in a relatively central position in the overall design.

At the same time, in the above design, especially in the process of data transmission, we also need to pay attention to some problems.For example, when the data transmission device sends real-time data to the shore, we must prevent others from stealing or tampering with the data while ensuring the readability of the data, which requires a unified protocol for transmission.For another example, due to network problems, etc., data may be wrong or missing.Therefore, after receiving the data, it is necessary to analyze the data first, and then remove the outliers and fill in the missing values.

Then why choose TSDB as the database storage option for the ship risk management system?Generally speaking, there are two types of traditional DBMS (Database Management System).One is a relational database, such as SQL Server, MySQL, etc. The problem of this type of database is that its structure is complex and the data is not easy to expand. If a large amount of data is written in real time, it is unbearable.The other type is non-relational databases, such as MongoDB, Redis, etc. The problem with such databases is that the development and maintenance costs are relatively high.In the navigation of ships, all kinds of data have the characteristics of high real-time and large amount of data, and they are all sorted in time series.In terms of data query of the risk management system, it is also mainly based on time period query, which makes the traditional database unable to meet the requirements for the use of the ship risk management system.Neither due to structural issues nor development and maintenance costs are suitable as databases for ship risk management systems.Therefore, in order to solve related problems, the application of TSDB is still the most suitable choice for everyone.

This is the end of this issue. Thank you for your continuous attention to the CnosDB community. If you have any questions, you can give us your opinion through GitHub by raising Issues or Discussions, etc. CnosDB will also give you feedback as soon as possible.

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