A method and system for determining the verification cycle of ship instrumentation

Abstract

The invention relates to a ship instrument verification period determination method and system. Specific to the characteristic of large ship instrument verification amount, a Chi-square distribution model is established according to the instrument verification qualification situation of each batch; a judgment on whether or not an existing verification period is reasonable is made with a hypothesis testing method; and a corresponding adjusting method is provided. The verification period of instruments is adjusted reasonably, so that the technical problem of hidden danger to the accuracy and reliability of equipment performance caused by over-heavy verification task, cost increase and overlong verification period due to over-short verification period and high verification frequency in the prior art is solved. Meanwhile, the problems that a practical verification time interval is inconsistent with a specified verification period and that verification data is difficult to count and analyze since the instruments are under the influences of navigational duty and repair are solved. Through adoption of the model based on Chi-square distribution, specific reliability models of the instruments under verification do not need to be known, and certain universality is achieved.

Description

technical field [0001] The invention relates to the technical field of periodic verification of ship instruments, in particular to a method and system for determining the verification cycle of ship instruments. Background technique [0002] Ships are equipped with a large number of instruments for monitoring working conditions. In order to ensure that the instruments and meters can function normally, they must be calibrated regularly. According to the national metrology technical specifications, one of the basic principles for determining the instrument verification cycle is to determine the verification cycle based on the characteristics, performance requirements and usage of the instrument itself. However, the current verification cycle of ship instruments and meters is generally estimated, and the verification cycle is mostly agreed to be one year or half a year. Adopting a fixed verification period will bring some problems: too short a verification period will cause exc...

AI Technical Summary

Problems solved by technology

Using a fixed verification period will bring some problems: too short a verification period will cause excessive verification tasks and increase costs due to high verification frequency; too long a verification period will bring hidden dangers to the accuracy and reliability of equipment performance

[0003] In addition, ship instruments are affected by navigation tasks and maintenance, and the actual verification time interval is not consistent with the specified verification cycle, which brings difficulties to the statistical analysis of verification data.

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