Motor noise and vibration reflect quality control problems for the motor production process,finding out the cause through testing and analyzing the spectrum of motor noise and vibration to educe the main noise sources, thus guiding to improve motor production quality. In this paper by means of noise and vibration measurements, meanwhile carry out statistical and analysis for the measured data to find the influence size of various factors with quality analysis tool, and then adopt some corresponding measures to control the motor noise, hoping to improve the motor quality.
Electrical energy meter is one of the most important metrology equipments.It is also a kind of metrology apparatus for commercial exchange.Its credibility is important to consumers and corporations of electrical power especially after the legislation of “one meter for each family”.It is related to one’s immediate and vital interests of average masses directly.Therefore,the verification of electrical energy meters becomes more and more important. The context of Electrical energy meter working mechanism, functions, and its technical conditions and detection method introduced.
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