Abstract
Uncertainty measurement is one of the important indexes to quantitatively describe the quality of measurement results, which directly reflect the reliability, feasibility and comparability of the measurement results, meanwhile, keep the noise measured under the requirement of quality control. In this paper, By designing the air noise test of ship air compressor and scientifically calculating the uncertainty of the test, Starting from many factors affecting the vibration and noise test, and considering all factors affecting the test results, the scientific analysis system of uncertainty is used. A good reference basis is provided for the uncertainty calculation of subsequent tests. firstly measure the air noise of marine equipment based on GJB 4058-2000, then according to JJF 1059-2012, analyze and evaluate the uncertainty of measurement in detail: analyzing the sources of measurement uncertainty as well as giving the results of measurement uncertainty. scientific protection of sound level meter and other precision equipment should be considered especially. The environment in which the sound level meter is placed has a great influence on the sensitivity of the sound level meter, so the effectiveness of measurement can be improved by placing the sound level meter in the incubator after the measurement verification. This research is suitable for practical application.
Highlights
The quality of the measurement result is measured by the measurement error, but the measurement error can only show the short-term quality of the measurement
Whether the measurement process is under continuous control, whether the measurement results can remain stable and consistent, and whether the measurement capability meets the requirements of production profitability, it needs to be measured by measurement uncertainty
Measurement uncertainty is a quantitative characterization of the quality of measurement results, and the availability of measurement results largely depends on the size of its uncertainty
Summary
The quality of the measurement result is measured by the measurement error, but the measurement error can only show the short-term quality of the measurement. Using noise detector to measure the air noise is an important means in the control of vibration attenuation and noise reduction. In this process, instruments used, measuring method and measurement procedure always keep invariant, and similarity as measuring objects. Uncertainty measurement is one of the important indexes to quantitatively describe the quality of measurement results, which directly reflect the reliability, feasibility and comparability of the measurement results, keep. American Journal of Mechanical and Industrial Engineering 2021; 6(5): 77-80 the noise measured under the requirement of quality control. Summarize the general method of evaluating marine equipments air noise measurement uncertainty, and this method has strong engineering practical significance
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