Charging pile noise reduction control method, device and system based on clustering analysis

Abstract

The invention provides a charging pile noise reduction control method, device and system based on clustering analysis, and the method comprises the steps: collecting a noise signal, and taking the noise signal as a feedforward signal; performing signal fusion on the feedforward signal to obtain a primary signal; processing the primary signal by using an FxLMS algorithm, and outputting a secondary sound field signal; offsetting the noise signal and the secondary sound field signal to obtain a residual noise signal; collecting residual noise signals, and calculating a decibel mean value; acquiring a noise threshold interval corresponding to the current time period; judging whether the decibel mean value converges to the lower limit of the noise threshold interval; judging whether the decibel mean value exceeds the upper limit of the noise threshold interval or not; according to the invention, two sensors are adopted to collect noise signals, and a signal fusion technology is utilized to obtain accurate primary signals. And meanwhile, different requirements on noise in different environments and time periods where the charging pile is located are considered, a dynamic threshold interval is set, and the noise reduction efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of active noise control, and in particular relates to a method, device and system for noise reduction control of charging piles based on cluster analysis. Background technique [0002] With the popularity of new energy vehicles, the number of charging piles has also increased. Charging piles belong to high-power electrical equipment and often need to be cooled by forced air cooling, which causes huge noise pollution to the surrounding environment. For the noise problem of charging piles, traditional methods such as noise reduction with sound insulation materials have been unable to meet the needs of noise reduction, so the research on active noise reduction is extremely important. [0003] In the existing active noise reduction technology, a single sensor is basically used to collect noise signals, and an accurate feedforward signal cannot be obtained. At the same time, most of the noise thresholds are art...

AI Technical Summary

Problems solved by technology

Charging piles are high-power electrical equipment, which often need to be cooled by forced air cooling, which causes huge noise pollution to the surrounding environment

Aiming at the noise problem of charging piles, traditional methods such as using sound insulation materials for noise reduction can no longer meet the needs of noise reduction, so the research on active noise reduction is extremely important

[0003] In the existing active noise reduction technology, a single sensor is basically used to collect noise signals, and it is impossible to obtain accurate feedforward signals

At the same time, the noise threshold is mostly set artificially, and cannot be automatically updated according to the surrounding environment and time period, and cannot achieve effective noise reduction.

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